When you are expecting to win and turned out that luck isnt on your side on that particular moment, then you will be ending up on having that kind of disappointment and frustration because it is opposing on what you are that anticipating into. Its important that you do really need up to consider that losing is most likely that will happen on gambling or the rate of losing is way more than on what you do able to win up. You wont get stressed if you arent that expecting something positive then these loses will be that not a big issue for you and you do rather found yourself that easily moves on and wont be having that any impulsive actions that be taken or any something that will be putting up you into danger specially when it comes to financial aspects on which its always been best to have this kind of thinking or approach rather than on making yourself that being that too positive into something that didnt happen on which it do bring out that frustration.
A good way to avoid getting shocked and facing tense conditions is to expect less. We get deceived in many things because we expect a lot, and the responses are not equivalent to what we thought would happen. In gambling, anything is possible at any time, we can't be sure about anything, and if someone is more certain, they may use some illegal techniques. So, if you mentally prepare yourself for the possibility that the results will not be in your favor, you will experience less loss of money and feelings. I use this kind of mentality when I bet; I prepare myself for both positive and negative results, and if anything happens, I just react without taking it out on myself.